Fuel-regulation device for internal-combustion engines



'Jne 28,, 1927.

R.`0. DONNELLY FUEL REGULATISJN DEVICE FOR ITERNAL COMBUSTION ENGINES Filed June 22, 1922 Fi'g. 5.

Patented June 28, 1927a RICHARD OWEN DONNELLY, OF VICTORIA, BRITISH COLUMBIA, CANADA.

F'UEL-REGULATION DEVICE FOR INTERNAL-COMBUSTION NGINES.

Application filedeJ'unef 22, 1922, Serial No. 570,266, land in Canada January 31, 1922.

The devices hitherto l-:nown and used which regnlate the fiow and appor'tion thel `Qaseous mixture to the various cylinders are admittedly defective for various and obvious reasons, amonzst which the following` are pr'ominentz-viz. the neessarily varyin; distance of the several cylinders from` the carlnu'ettor` the effects incident to which are coinplieated by the 'varying times during' which the several valves are opened orclosecL which action sets up pulsating effects in the stream line of the incorning` gases, the effect of these periodic but irreg'ular pulsations is such that one or more cylinders of a set receive much less than their adequate supply of fuel gas, with the obvious consequence that irregularity of the driving moment on the shaft occurs in varying degrees, thus it frequently happens as shown by an average of indicator cards) that one cylinder may be exerting only sufiicient power to overcome its own inertia7 if not aeting as an actual drag' on the other cylinders.

By my invention the injurious pulsating effect above referred t-o is en'tirely eliminated or at least greatly reduced.

From a considerationl of the foregoing' premises, taking for simplicity the case of a single cylinder engine it will be seen that the gases in the induction pipe are suddenly exposed to a partial vacuum in 'the cylinder every time that the inductive valve on the cylinder is opened and in consequence a sudden flow or rush of gaseous mixture is set up in the pipe which is as sud-:lenly arrested when the aforesaid valve is closed; 'this surging action of the fuel stream has a very-Y direct effecton the gasoline consumption as well as on the smooth running and regularity of the engine performance as a whole.

The method I adopt in my device for neutralizing,` the action above referred to, is to insert at some convenient location between the earburettor and the cylinder7 such as for instance betwen the carburettor flange andv the flange of the manifold intake a lateral su aplementary gas Chamber which although in communication laterally with the stream line of the fuel gas is not inthe direct line of the fuel flowv absorbing eXcess pressure ehibit but one of many methods of application. that must readily occur to a resourceful engineer desiring to'utilize the features of the device: in the present instance the application is shown at one of the most usua'l points Viz -at the flange of the carburettor ano interposed between 'that flange and the flange of the vmanifold intake to which the carburettor is usually attached: a, is the flang'e made to match'that on the carburettor as above described, but otherwise of special form, the ns'ual circular hole' b, which coincides with the manifold connection opens out laterally intoashallow cavity c on thetrans verse horizontal center line of the flange, ex' tending beyond the w outline of the fiange proper to form on each side of the fiange a bell-mout-hing of elongated elliptical shape d, which is thus especially shapeol in order to .rece1ve on each side a short metal pipe e,

which is flattened at f, and expanded at 5:7, to fit over the said elliptical bell-mouthing, to which it is soldered, brazeda or otherwise secured at h.

It will thus be seen that by lthe construction indicated, a pair of symmetrical lateral chambers are formed which'in practise act as alateral gas cushion, or compensator, which functions as a `receiver or absorber during periods of maximum pressure and as a repellent or ej ector during the corresponding opposite conditions: thus eXer'ting an equalizing effect on the gas stream after the same fashion as an air vessel 011 Water pipe line, 01' a fiy Wheel on an engine shaft.

Vhat I claiin as my invention and desire to secure by Letters Patent, is:

In an internal coinbustion engine a fuel regulating device 1:01' insertion between the carburetter and' the intake; niani'fold: 80111 prising, helloW flange-1nen1ber ot' metai having a central bore at right angles to the plane of its fiange surfaces, said member having a lateral Chamber on each side of the axis of its bore, each said Chamber hzwing` a constricted Outlet to said bore.

RICHARD' OWEN DONNELLY. 

